Traversing mechanism for radial drills



July l, l930- c. F. RANDOLPH v 1,768,932

TRAVERSING MECHANISM FOR RADIAL DRIL-LS Filed' Nov.l 25, 1925 2 Smets-sheet 1 By i Z, y i ArronNEr July 1, 1930.V

c. F. RANDOLPH TRAVERSING MECHANISM FOR RADIAL DRILLS Fi1ed Nov. 25, 1925 2 sheets-sheenl 2- IN1/Enron n f 1 15 @E '17 5v Patented July 1, 1930 Unire l stares PATENT FFICE CLIFFORD F. RANDOLPH, OF PLAINFIELD', NEW JERSEY, ASSIGNOR, BY MESNE AS` SIGNMENTS, TO GENERAL MACHINERY vCOltd?ORATION OF DELAWARE CORPORATION, OF HAMILTON, OHIO, .A

TRAVERSING MECHANISM FOR RADIAL DRILLS Application filed November 25, 1925. Serial No. 71,362.

` This invention relates to traversing means for the tool head of a radial drill along its horizontally extending arm and for traversing other members.

An object of the invention is to provide improved traversing mechanism for rapidly moving the tool head of a radial drill along its arm in either direction, either manually Lor by power applied thereto.

Anotherobject 'of 'the invention is to provide a singlev actuating member by means of which the head may be traversed manually along the arm in either direction or power means may be engaged thereby to traverse the head in either direction.`

One feature rwhich is advantageous is that a single handle is provided which in one position may be oscillated horizontally in either direction to traverse the head along its arm, or, in another position the handle may be oscillated to engage a clutch to actuate power mechanism so that the head may be traversed in yeither direction by motive power on thel left hand threads is provided extending along the rail an-d engaged by individual nuts.

Either one of these nuts is adapted to be clutched to a nonrotatabl'e member on the head.

Wfith the above and other objects in View, my invention consists in the features of construction and operation set forth in the following specification and illustrated in the accompanying drawings.

In the accompanying drawings annexed hereto and forming a part of this specification, I have shown my invention embodied in the head of a radial drill having a horizontal arm, but it will be understood that the invention can be otherwise embodied and that the drawings ar-e not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose.

yIn the drawings:

Figure 1 is a front elevation of a part of a radial drill arm and head having the present o invent-ion applied thereto.

Fig. 2 is aside elevation of the head and arm, parts being shown in cross section.

Fig. 3 is a horizontal sectional view takenV upon the line 3 3 of Fig. 2,. l

Fig. 4l is a cross sectional view upon an enlarged scale of the power traversing means,

and

vention comprises the following principal parts: lirst, an arm; second, a headmovably supported thereon; third, a rack extending along the arm; fourth, a pinion on the head engaging said rack; fifth, a shaft carrying said pinion; sixth, a handle adapted-to be attached to the shaft so that the pinion may be rotated slightly to manually traverse the head in either .direction along the arm; seventh, a left and right hand threaded screw extending along the arm; eighth, nuts engaging the individual threads of said screw; ninth, a clutch adapted to engage either one of said nuts; and tenth, means actuated by oscillatory movement of the handle for actuating the clutch.

Referring more in detail to the figures of the drawings, the invention is adapted primarily for traversing a tool carrying head on a horizontally extending arm 11 as shown inFigs. 1 and 2. Only limited portions or parts of the arm 11 and the head 10 are shown, and it will be understood that the mechanism for rotating a spindle 12 inthe head 10 and advancing it during its feeding operation may be of any usual type. `Also, a column (not shown) of any well-known or usual construction may bel used for horizontally supporting the arm so that it may be raised and lowered.

Along the arm 11 extends a rack 13, preferably ina direction parallel to the move- Fig. 5 is an enlarged View of the operatment of the head 10. Adapted to engage this rack 13 is a pinion 14 keyed, or otherwise secured, to the upper end of a vertical shaft 15 rotatably mounted within the head 10. At the lower end of the shaft 15 is a member keyed thereto so that oscillation of the member 16 will oscillate the shaft 15 and pinion 14 in either direction to traverse the head 10 correspondingly along the arm 11.

To os'cillate the member 16 and the shaft 15 a handle 17 is provided. This handle 17 is pivotally mounted on a sleeve 18 surrounding the shaft 15 and supported within the head 10. For this purpose the sleeve 18 is provided with a circumferential groove 19 which may be engaged by a pin 20. On the member 16 are teeth so that this member forms one-half of a clutch. The other half of the clutch member 21 having interengaging teeth is keyed to the lower end of a sleeve 22 slidable upon the shaft 15 and within the member 18. Vith this sleeve 22 lowered so that the teeth of the clutch members 16 and 21 are interengaged the shaft 15 may be oscillated by oscillation of the handle 17. As shown in Fig. 5 the handle 17 pivotally engages the sleeve member 18 so that vertical oscillation of the handle 17 engages and disengages the members 16 and 21 of the clutch. By means of this mechanism the handle 17 when the `clutch members 16 and 21 are engaged may be oscillated horizontally to slightly rotate the shaft 15 in either direction. Repeated oscillations of the handle 17 horizontally and vertically to engage and disengage the clutch 16-,21 enables the pinion 14 to be rotated slightly to adjust the head 10 along the arm l11 manually.

Extending along the arm 11 in a direction parallel to the movement of the head 10 is a screw 25, preferably double threaded, with a left and right hand thread, as shown clearly in Figs. 1 and 4. Engaging this screw 25 are two nuts 26 and 27 one of which engages the left hand thread and the other the right hand thread. These nuts 26 and 27, as will be seen in Fig. 3, may be formed of babbitt or other bearing material and are positioned within sleeves 28 and 29. On the end of each sleeve 28 and 29 is one mem-ber of a cone clutch 30 and 31 respectively. By means of suitable internal projections 31a formed on the sleeves 28 and 29 this bearing material may be held from rotating relative to its sleeve. As shown in Fig. 4, these sleeves 28 and 29 are positionedV in opposed relation to each other and are spaced from each other and from parts of the head 10 -by suitable thrust bearings 32, preferably of the ball type. Surrounding these sleeves 28 and 29 so that the sleeves may normally rotate within it is a clutch member 33 having at its opposite ends conical recesses adapted to interengage with the conical ends 30 and 31 of the nuts 26 and27. This clutch member 33 is adapted to slide axially relative to the Vnuts 26 and 27 and sleeves 28 and 29 a limited distance so that one or the other of the sleeves 28 or 29 may be gripped by the clutch member 33. The clutch member 33 is held against rotation while being permitted to move axially by means of splines or keys 34. It will be seen from this operation that by moving the clutch member 33 in one direction one of the nuts 26 may be held against rotation so that rotation of the threaded shaft 25 will traverse the head 10 in one direction due to the rotation of the screw 25. By engaging the other nut 27 withV the clutch member 33 the traversing movement of the head 10 will be inthe opposite direction. Normally the screw 25 is continuously rotated and, as the lead of the threads is long, the nut 26 or 27 not engaged by theclutch 33 will be rotated and advanced along the screw 25. The clutch member 33 is suitably retained within a recessed portion of the head 10 and is slidable thereupon while being held against rotation by keys 34 freely slidabl-e withink splines formed within the head 10.

In order to actuate the clutch member 33 to engage either of the nuts 26 or 27, use is made of the handle 17 previously described for effectingthemanualtraversingmovement. The sleeve 22 surrounding the lower portion of the vertical shaft 15 is provided at its upper end with suitable clutch teeth 22EL adapted to engage corresponding tooth portions 35a on a yoke member 35 loosely mounted on and surrounding the vertical shaft 15. This member 35 has shoes 36 engaging an annular recess 37 within the clutch member 33. It will be seen from this construction that oscillation of this yoke member 35 will move the clutch member 33 in either direction and thus operate the power mechanism for effecting the traversing motion. In order to engage the members of this clutch, th-e handle 17 at the lower end of the vertical shaft 15 is first oscillated vertically to engage teeth 35a on the yoke 35 with the teeth 22L on sleeve 22 after which horizontal oscillation of the handle 17 will7engage one or the other of the nuts 26 or 2 From this construction it will be seen that the handle 17 when in its lower` oscillated position may be used to manually traverse the head 10 along the arm 11 through the shaft 15, the pinion 14 and rack 13. In its upper oscillated position the handle 17 may be simi larly oscillated in a horizontal plane to effect traversing movements of the head by means of the double threaded screw 25 and the clutch 33. As shown clearly in Fig. 5 vertical movement of the handle 17 disengages the teeth on members 16 and 21. Similarly downward movement of the handle 17 disengages the yoke 35 from the sleeve 22. It is therefore impossible for both clutches to be simultaneously engaged. Also, as shown in Fig. 5, the handle 17 is provided with an upward extending projection 37a which at its upper end may have a pin 38 extending transversely into the sleeve 22. Horizontal oscillation of What I claim is:

1. A traversing mechanism for drills comprisin g in combination, an arm, a head mount ed for movement therealong, a rack extending along said arms, a pinion on said head, manual means to rotate said pinion to traverse said head in either direction, a right and left threaded screw on said arm, means adapted to continuously rotate said screw, nuts separately engaging the threads of said screw, clutches engaging said nuts, and a single handle to manually rotate said pinion to traverse said head and to engage and disengage said eol clutches, whereby said head may be traversed manually or by power in either direction.

2. A traversing mechanism for drills comprising in combination, an arm, a head mounted for movement therealong, a rack eX- tending along said arm, a pinion in said head, manual means to rotate said pinion to traverse said head in either direction, clutch means to engage said manual traversing means, a right and left threaded screw on said arm, means adapted to continuously rotate said screw, nuts separately engaging the threads of said screw, friction clutches engaging said nuts, and a handle to operate said manual means when said first mentioned clutch is in operative position and when oscillated to another position to actuate said friction clutches to effect traversing from said screw.

In testimony whereof, I hereto affliz my signature.

CLIFFORD F. RANDOLPH.

the handle 17 therefore oscillates the sleeve 

